CN218932916U - Cable-stayed bridge front fulcrum hanging basket upper box type bearing main truss - Google Patents
Cable-stayed bridge front fulcrum hanging basket upper box type bearing main truss Download PDFInfo
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- CN218932916U CN218932916U CN202223310046.2U CN202223310046U CN218932916U CN 218932916 U CN218932916 U CN 218932916U CN 202223310046 U CN202223310046 U CN 202223310046U CN 218932916 U CN218932916 U CN 218932916U
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- sliding
- sliding beam
- cable
- hanging basket
- main truss
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Abstract
The utility model discloses a box-shaped load-bearing main truss at the upper part of a front fulcrum cradle of a cable-stayed bridge, which comprises two sliding beams which are arranged at intervals left and right, wherein each sliding beam is a box-shaped beam with a rectangular cross section, and a front wheel and a rear wheel are arranged below each sliding beam; the rear end of each sliding beam is provided with a balancing weight, the left side and the right side of the front part of each sliding beam are provided with limiting devices, the limiting devices are used for being anchored on the main beam, each sliding beam is also provided with a sliding beam rear anchor rod group and a sliding Liang Zhongmao rod group which are used for respectively hooping the middle part and the rear part of each sliding beam on the main beam, and the front end of each sliding beam is used for hanging a front supporting point hanging basket bottom basket; simple structure, simple to operate, walk swiftly, safe and reliable, rigidity is big, warp little and the relative independence between the main joist.
Description
Technical Field
The utility model relates to the technical field of bridge girder hanging basket hanging casting construction, in particular to a box-type bearing main girder at the upper part of a front supporting point hanging basket of a cable-stayed bridge, which is applied to the concrete girder segmental hanging casting construction of the cable-stayed bridge.
Background
The front supporting point hanging basket is used as a single-box multi-chamber box-type section girder cantilever pouring system of the bridge and is widely applied to various types of concrete girder cable-stayed bridges. According to the division of the concrete girder structure, the front supporting point hanging basket is used for constructing the main body structure of the girder by sections depending on the system structure of the front supporting point hanging basket. The main bearing truss is used as a core part of a bearing system at the upper part of the front supporting point hanging basket, and plays a vital bearing role in a main beam concrete cantilever pouring stage and a front supporting point hanging basket bottom basket walking stage.
The upper part bearing main truss of the front supporting point hanging basket which is widely applied at present is a triangular truss type bearing main truss formed by a plurality of rod pieces in a pin joint mode. The single triangular truss type bearing main truss has larger height and width and poorer self transverse stability, and transverse connecting rods are required to be installed between the two triangular truss type bearing main trusses of the front supporting point hanging basket. The triangular truss type bearing main truss is required to be provided with a profile steel track or a sliding block below the triangular truss type bearing main truss in the front supporting point hanging basket walking stage, and the walking strokes of the triangular truss type bearing main trusses on two sides are required to be consistent. The existing box-type bearing main truss at the upper part of the front supporting point hanging basket has the problems of complex structure, difficult installation, complicated walking steps, poor safety and stability, small overall rigidity, large deformation after being subjected to working condition load and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide the box-type bearing main truss at the upper part of the front fulcrum cradle of the cable-stayed bridge, which has the advantages of simple structure, convenient installation, fast walking, safety, reliability, high rigidity, small deformation and relatively independence between the main trusses.
The technical scheme adopted by the utility model is as follows: the box-shaped load-bearing main truss at the upper part of the front fulcrum cradle of the cable-stayed bridge comprises two sliding beams which are arranged at intervals left and right, wherein each sliding beam is a box-shaped beam with a rectangular cross section, and a front wheel and a rear wheel are arranged below each sliding beam; the rear end of each sliding beam is provided with a balancing weight, the left side and the right side of the front part of each sliding beam are provided with limiting devices, the limiting devices are used for being anchored on the main beam, each sliding beam is also provided with a sliding beam rear anchor rod group and a sliding Liang Zhongmao rod group which are used for respectively hooping the middle part and the rear part of each sliding beam on the main beam, and the front end of each sliding beam is used for hanging a front supporting point hanging basket bottom basket.
As the optimization of the scheme, the limiting device can be detachably installed and anchored on the main beam so as to realize the recycling in the next construction cycle.
It is further preferable that a front bracket is provided at a position close to the front wheel, a rear bracket is provided at a position close to the rear wheel, a front cushion block is provided at the bottom of the front bracket, a rear cushion block is provided at the bottom of the rear bracket, a lifting mechanism is provided at each slide beam, and the slide beam can be lifted by the lifting mechanism after walking, and the cushion blocks are supported under the brackets, so that the load bearing of the slide beam is transferred from the front wheel to the rear wheel.
Further preferably, the sliding beam adopts a front-back two-section structure and is connected into a whole through a high-strength bolt, and a reinforcing rib plate is arranged in the sliding beam. The box-type bearing main truss is divided into two sections, and is connected by high-strength bolts, so that the hoisting is convenient; and the integral strength of the sliding beam is increased.
More preferably, the front wheel and the rear wheel are triaxial steel wheels.
Further preferably, a set of main truss traveling reaction force devices are arranged on the central axis directly below each slide beam.
The utility model has the beneficial effects that:
(1) Simple structure and convenient installation. The two box-type bearing main trusses are relatively independent and can be respectively anchored on the concrete main girder without installing a connecting rod piece between the two box-type bearing main trusses.
(2) The walking is quick, safe and reliable. The box-type bearing main truss does not need a section steel track for walking, can directly walk on a concrete main beam by virtue of front and rear wheels, has better transverse stability, and has large width, so that a basket bottom basket walking counterforce device is convenient for a subsequent front fulcrum to hang.
(3) The main truss has high rigidity and small deformation. The settlement of the front supporting point hanging basket after the girder concrete is poured is greatly reduced, dislocation between girder sections is avoided, linear control of the girder of the cable-stayed bridge is facilitated, and the cable-stayed bridge monitoring system has positive effects on bridge monitoring work.
Drawings
FIG. 1 is a schematic side elevational view of the present utility model;
FIG. 2 is a top view of the present utility model;
FIG. 3 is a cross-sectional view of the present utility model at the front bracket;
FIG. 4 is a cross-sectional view of the utility model at the rear wheel;
fig. 5 is a use state diagram of the present utility model.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
referring to fig. 1-5, a main girder of a box-type bearing at the upper part of a front supporting point hanging basket of a cable-stayed bridge is composed of two sliding girders 1 which are arranged at left and right intervals.
The skid beam 1 is a box beam with a rectangular cross section. The sliding beam is of a box structure, serves as a beam top bearing main truss, is a main bearing structure for front supporting point hanging basket bottom basket walking and anchoring, and is used as a working platform of a front supporting point hanging basket bottom basket walking counterforce device. Preferably, the sliding beam 1 adopts a front-back two-section structure and is connected into a whole through a high-strength bolt 8, and a reinforcing rib plate is arranged in the sliding beam 1.
A front wheel 3 and a rear wheel 4 are arranged below each sliding beam 1. The front wheel 3 and the rear wheel 4 are preferably triaxial steel wheels. The front wheels 3 and the rear wheels 4 are respectively in a pair and are arranged at two sides of the sliding beam 1, and the beam top bearing main truss travelling mechanism 1 directly travels on the bridge deck by utilizing the front wheels 3 and the rear wheels 4 without additionally paving a track.
The rear end of each skid beam 1 is provided with a counterweight 6.
The slide beam 1 is provided with a stopper (not shown) on both left and right sides of the front portion thereof, and the stopper is for anchoring to the main beam a. The device is used for limiting the walking track of the sliding beam and ensuring the walking transverse precision in the walking process of the beam top bearing main truss walking mechanism. Preferably, the limiting device can be detachably mounted and anchored on the main beam A so as to realize the recycling in the next construction cycle.
Each sliding beam 1 is also provided with a sliding beam rear anchor rod group 9 and a sliding beam middle anchor rod group 10 which are used for respectively hooping the middle part and the rear part of the sliding beam 1 on the main beam A, and the front end of each sliding beam 1 is used for hanging a front supporting point hanging basket bottom basket 7.
A front bracket 5 is arranged near the front wheel 3, a rear bracket 2 is arranged near the rear wheel 4, a front cushion block 51 is arranged at the bottom of the front bracket 5, a rear cushion block 21 is arranged at the bottom of the rear bracket 2, each slide beam 1 is provided with a jacking mechanism (not shown in the figure), the slide beam 1 can ascend by utilizing the jacking mechanism after walking, and the cushion blocks are supported below the brackets, so that the bearing of the slide beams is converted from the front wheel to the rear wheel.
A set of main truss traveling reaction devices (not shown in the figure) are arranged on the central axis directly below each sliding beam 1.
The specific installation method comprises the following steps: and (3) measuring and lofting on the zero number block of the poured girder, determining the central axis position and the mileage position of the box-shaped bearing main truss, marking, horizontally paving a row of sleepers in front and back of the position of the previous section of sliding beam according to the mark, lifting the next section of sliding beam to the sleeper at the designated position by using a tower crane, installing a sliding beam rear anchor rod group 9, lifting the front sliding beam section to the mileage position, adjusting the interface position and angle between the front sliding beam section and the rear sliding beam section by using a chain block, connecting the front sliding beam section and the rear sliding beam into a whole by using a connecting plate and a high-strength bolt 8 after the interface is combined, installing a sliding Liang Zhongmao rod group 10 after the box-shaped bearing main truss is anchored, and finally installing a front wheel 3, a rear wheel 4, a front cushion block 51 and a rear cushion block 21. After the installation of the components of all the box-type bearing main trusses is completed, the rear anchor rod group 9 of the sliding beam and the anchor rod group 10 in the sliding beam are unscrewed, the front bracket 5 and the rear bracket 2 are jacked up simultaneously by using a jacking mechanism (hydraulic jack), the sleeper is pulled out, the box-type bearing main trusses are lowered onto the front cushion block 51 and the rear cushion block 21, the anchor rod groups of the box-type bearing main trusses are screwed down again, and the installation work of the box-type bearing main trusses is completed.
The application method of the utility model comprises the following steps: when the box-shaped bearing main truss at the upper part of the front supporting point hanging basket walks, the hanging device 11 of the hanging basket bottom basket 7 is loosened, the sliding Liang Zhongmao rod group 10 and the sliding beam rear anchor rod group 9 are sequentially removed, the hydraulic jack is utilized to simultaneously act on the front bracket 5 and the rear bracket 2, the front cushion block 51 and the rear cushion block 21 are removed, the box-shaped bearing main truss is lowered, the front wheels 3 and the rear wheels 4 fall onto the girder concrete, the box-shaped bearing main truss limiting device and the walking counterforce device are installed, the box-shaped bearing main truss walks to the appointed position, the box-shaped bearing main truss is lifted and installed by referring to the lowering box-shaped bearing main truss method, the load is transferred onto the concrete girder by the aid of the lower box-shaped bearing main truss again, the sliding Liang Zhongmao rod group 10 and the sliding beam rear anchor rod group 9 are finally installed and anchored, and the following hanging basket bottom basket 7 walks and the corresponding section concrete girder construction is carried out.
Claims (6)
1. The utility model provides a basket upper portion box bearing main truss is hung to fulcrum before cable-stayed bridge which characterized in that: the device comprises two sliding beams (1) which are arranged at intervals left and right, wherein the sliding beams (1) are box-shaped beams with rectangular cross sections, and a front wheel (3) and a rear wheel (4) are arranged below each sliding beam (1); the rear end of each sliding beam (1) is provided with a balancing weight (6), the left side and the right side of the front part of each sliding beam (1) are provided with limiting devices, the limiting devices are used for being anchored on a main beam (A), each sliding beam (1) is further provided with a sliding beam rear anchor rod group (9) and a sliding Liang Zhongmao rod group (10) which are used for respectively hooping the middle part and the rear part of each sliding beam (1) on the main beam (A), and the front end of each sliding beam (1) is used for hanging a front supporting point hanging basket bottom basket (7).
2. The cable-stayed bridge front support hanging basket upper box type bearing main truss according to claim 1, wherein: the limiting device can be detachably mounted and anchored on the main beam (A) to realize the recycling in the next construction cycle.
3. The cable-stayed bridge front support hanging basket upper box type bearing main truss according to claim 1, wherein: the front bracket (5) is arranged at a position close to the front wheel (3), the rear bracket (2) is arranged at a position close to the rear wheel (4), a front cushion block (51) is arranged at the bottom of the front bracket (5), a rear cushion block (21) is arranged at the bottom of the rear bracket (2), each sliding beam (1) is provided with a jacking mechanism, the sliding beams (1) can ascend by utilizing the jacking mechanism after walking, and the cushion blocks are supported below the brackets, so that the bearing of the sliding beams is converted from the front wheel to the rear wheel to the front bracket and the rear bracket.
4. The cable-stayed bridge front support hanging basket upper box type bearing main truss according to claim 1, wherein: the sliding beam (1) adopts a front-back two-section structure and is connected into a whole through a high-strength bolt (8), and a reinforcing rib plate is arranged in the sliding beam (1).
5. The cable-stayed bridge front support hanging basket upper box type bearing main truss according to claim 1, wherein: the front wheel (3) and the rear wheel (4) adopt triaxial steel wheels.
6. The cable-stayed bridge front support hanging basket upper box type bearing main truss according to claim 1, wherein: a group of main truss walking counterforce devices are arranged on the central axis under each sliding beam (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223310046.2U CN218932916U (en) | 2022-12-09 | 2022-12-09 | Cable-stayed bridge front fulcrum hanging basket upper box type bearing main truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223310046.2U CN218932916U (en) | 2022-12-09 | 2022-12-09 | Cable-stayed bridge front fulcrum hanging basket upper box type bearing main truss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218932916U true CN218932916U (en) | 2023-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223310046.2U Active CN218932916U (en) | 2022-12-09 | 2022-12-09 | Cable-stayed bridge front fulcrum hanging basket upper box type bearing main truss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218932916U (en) |
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2022
- 2022-12-09 CN CN202223310046.2U patent/CN218932916U/en active Active
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